RX1 (USPP# 20649)
An advanced selection of paradox hybrid, a cross of texas Black and english. Selected for its resistance to phytophthora and good survivability.
VX211 (USPP# 21179)
An advanced selection of paradox hybrid, a cross of Northern California black and English. Selected for its root lesion nematode tolerance and higher vigor. This selection also has moderate resistance to phytophthora and survives well in field tests.
A commercial standard Paradox rootstock, (J.hindsii x J.regia) grown by micro-propagation, which originated from a vigorous Paradox tree in Stanislaus County.